A young woman found this skull in a cave in Mexico when she was between 12 and 14 years of age. She kept it all her life, most of the time in a cardboard box in her garage. Upon her death, she gifted it to a couple, friends of hers who were also members of MUFON El Paso, where she lived in the latter part of her life. The skull changed hands a few times until it came into the hands of Lloyd Pye, who just happens to know about this kind of thing.
This YouTube video about the skull and how it is different than human is simply beyond fascinating. Enjoy!!